[Plugin: WordPress SEO by Yoast] Wrong domain in sitemap on multi site with domain mapping

AFIK everything is correct on https://angavallen.se – but the sitemap generated by the excellent WordPress SEO by Yoast seems to show the wrong domain.

I get the ”original” domain: angavallen.mindpark.se instead of the ”primary” domain: angavallen.se

Any ideas on where I’ve gone wrong, this can not be expected behavior, right?

https://www.ads-software.com/extend/plugins/wordpress-seo/